chore: propose increasing horizontal padding to 18px

This prevents the focus indicator in MD from being clipped when there is no start icon or label with the ion-range.

Author: sean-perkins

core/src/components/range/range.md.vars.scss

@@ -7,7 +7,7 @@
 $range-md-padding-vertical:                  8px !default;
 
 /// @prop - Padding start/end of the range
-$range-md-padding-horizontal:                14px !default;
+$range-md-padding-horizontal:                18px !default;
 
 /// @prop - Height of the range slider
 $range-md-slider-height:                     42px !default;